The centrifuge Digtor 21 C-U is designed for the determination of water and sediments in oils, and characteristics of precipitation and demulsibility and the characterization of waste oils, in process that do not require heating. It is provided with accessories for spin cylinder-conical tubes of 6 and 8 inches, pear-shaped tubes of 6 inches and tubes for trace elements and 12,5ml. Its proper for processing samples according following standards: ASTM D 91, D 96, D 893, D 2273, D 2709, D 2711, D 5546, API 2542, API 2548, BS 4385, ISO 3734, IP75.